CN1795417A - Information recording medium and its manufacturing method, recording/reproducing method, and optical information recording/reproducing device - Google Patents

Information recording medium and its manufacturing method, recording/reproducing method, and optical information recording/reproducing device Download PDF

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Publication number
CN1795417A
CN1795417A CNA2004800146953A CN200480014695A CN1795417A CN 1795417 A CN1795417 A CN 1795417A CN A2004800146953 A CNA2004800146953 A CN A2004800146953A CN 200480014695 A CN200480014695 A CN 200480014695A CN 1795417 A CN1795417 A CN 1795417A
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China
Prior art keywords
mentioned
light
recording
carrier
fluorophor
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CNA2004800146953A
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Chinese (zh)
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CN1795417B (en
Inventor
盐野照弘
山本博昭
西野清治
伊藤达男
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Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/245—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing a polymeric component
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y10/00—Nanotechnology for information processing, storage or transmission, e.g. quantum computing or single electron logic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/72—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705
    • G03C1/73—Photosensitive compositions not covered by the groups G03C1/005 - G03C1/705 containing organic compounds
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • G11B7/00455—Recording involving reflectivity, absorption or colour changes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/246—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing dyes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/244—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only
    • G11B7/25—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising organic materials only containing liquid crystals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/251—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials dispersed in an organic matrix
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
    • G11B7/2538—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins polycycloolefins [PCO]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/21—Circular sheet or circular blank

Abstract

An information recording medium has a recording portion (3) where information is recorded/reproduced when a recording/reproducing light is applied. The recording portion (3) contains a first phosphor which absorbs a first light of wavelength lambda1/n where lambda1 is the wavelength of the recording light and emits a second light of wavelength longer than that of the first light and a photosensitive material of photon mode which absorbs the second light and its optical constant varies. The n-photon absorption sensitivity to the recording light for the first phosphor is larger than the n-photon absorption sensitivity to the recording light for the photosensitive material, wherein n is two or more integer.

Description

Carrier and manufacture method thereof and recording and playback method, apparatus for optically recording and reproducing information
Technical field
The present invention relates to can the recorded information bit carrier and manufacture method and recording and playback method, apparatus for optically recording and reproducing information.Be particularly related to the carrier of the photon mode that can carry out high sensitivity, high-speed record and manufacture method thereof and recording and playback method, apparatus for optically recording and reproducing information.
Background technology
As carrier that can three-dimensional ground recorded information, existing carrier shown in Figure 9 (Japanese river Tian Shanzheng etc.: " many Layer film Agencies makes The has the The Ru Machine recording medium The to be arranged with い 3 dimension light メ モ リ (employing has the three-dimensional light storer of organic recording medium that multilayer film constructs) ", p.95-96 optics Japan 2000 lecturees give the original text collection, 7pB12 (2000)).This recording medium has alternately disposed recording layer 101a～101d and the middle layer 102a～102c that adopts the recording materials of photon mode on glass substrate 104.The recording materials of photon mode have adopted urethane-urea block copolymer, and PVA (polyvinyl alcohol (PVA)) film or PMMA (polymethylmethacrylate) film have been adopted in the middle layer.
By recording layer convergent laser 108 (irradiation converging light 107) with the expectation of object lens 106 in a plurality of recording layer 101a～101d of this carrier, can recorded information.Here used laser 108 is that pulse width is about the very high pulse laser of 100 femtoseconds, peak power.By this pulse laser is converged on recording layer 101a～101d, can utilize two-photon absorption recorded information on recording layer 101a～101d of one of non-linear absorption phenomenon.
Specifically, two-photon absorption takes place in the high part (convergent point) of power density in converging light 107 irradiation areas of recording layer 101a～101d, converging light, shone the light (recording light) with actual irradiation wavelength a half-wavelength light phenomenon and write information bit 105.By on information bit 105, assembling lower powered light, detect its reflected light through object lens 106 usefulness photodetectors (not shown), can carry out signal reproduction.This carrier along the optical axis direction (z direction of principal axis) of object lens stacked a plurality of recording layers, so can carry out the three-dimensional information record, recording capacity is big.
But, the bad problem of recording sensitivity that above-mentioned existing carrier has recording layer.Therefore,,, need to adopt the very femtosecond laser of big (about about 100kW) of peak power, the problem of the complex structure of light source is arranged as light source using 1 pulse to form under the situation of write-once of 1 information bit.Perhaps, under the situation that adopts its little light source of peak power ratio, need be on same position duplicate record (for example tens～several thousand times) (owing to adopted the photon mode recording materials, so can cumulative record) repeatedly, the slow problem of writing speed is arranged.
Summary of the invention
Carrier of the present invention is, comprises recording portion, and by to above-mentioned recording portion irradiation recording light or playback light writes down or information reproduction, in addition, establishing above-mentioned record light wavelength is λ 1, then above-mentioned recording portion comprises: the 1st fluorophor, absorbing wavelength are λ 1The 1st light time of/n produces the 2nd light; With the photosensitive material of photon mode, absorb above-mentioned the 2nd light after, its optical constant changes; Above-mentioned the 1st fluorophor is to the n photonic absorption sensitivity of above-mentioned recording light, and is bigger to the n photonic absorption sensitivity of above-mentioned recording light than above-mentioned photosensitive material; Wherein, n is the integer more than 2.
Recording and playback method of the present invention is, to carrier record of the present invention or information reproduction, it comprises following step: above-mentioned recording light is shone on the above-mentioned recording portion, change the optical constant of above-mentioned photosensitive material with above-mentioned the 2nd light of above-mentioned the 1st fluorophor generation; In above-mentioned steps, above-mentioned the 2nd light wavelength is shorter than above-mentioned recording light and above-mentioned reproduction light wavelength.
The manufacture method of carrier of the present invention is, make following carrier, this carrier comprises the recording portion with the recording layer more than 1 layer, by to above-mentioned recording portion irradiation recording light or playback light writes down or information reproduction, this manufacture method comprises following operation: the coating that comprises the 1st fluorophor and photosensitive material by coating forms above-mentioned recording layer; If above-mentioned record light wavelength is λ 1, then above-mentioned the 1st fluorophor absorbing wavelength is λ 1The 1st light time of/n produces the 2nd light; Above-mentioned photosensitive material changes optical constant by absorbing above-mentioned the 2nd light; Above-mentioned the 1st fluorophor is to the n photonic absorption sensitivity of above-mentioned recording light, and is bigger to the n photonic absorption sensitivity of above-mentioned recording light than above-mentioned photosensitive material.
Apparatus for optically recording and reproducing information of the present invention is, carrier of the present invention is carried out recording of information or reproduction, and it comprises: the light source of outgoing recording light; The light source of outgoing playback light; Above-mentioned recording light and above-mentioned playback light are converged to object lens on the above-mentioned carrier; And the photodetector that detects the light that reflects by above-mentioned carrier; Utilize the variation of optical constant of the above-mentioned recording portion of above-mentioned carrier, on above-mentioned recording portion, form information bit.
Description of drawings
Figure 1A is the key diagram of the appearance of the section structure of carrier of embodiment of the present invention 1 and recoding/reproduction information, and Figure 1B is the enlarged drawing of the recording layer of the carrier shown in Figure 1A.
Fig. 2 A～Fig. 2 D is the sectional drawing of each manufacturing process of the carrier of embodiment of the present invention 1.
Fig. 3 is the summary construction diagram of optical head of the apparatus for optically recording and reproducing information of embodiment of the present invention 1.
Fig. 4 A is the key diagram of the appearance of the section structure of carrier of embodiment of the present invention 2 and recoding/reproduction information, and Fig. 4 B is the enlarged drawing of the recording layer of the carrier shown in Fig. 4 A.
Fig. 5 A is the key diagram of the appearance of the section structure of carrier of embodiment of the present invention 3 and recoding/reproduction information, and Fig. 5 B is the enlarged drawing of the recording layer of the carrier shown in Fig. 5 A.
Fig. 6 A is the key diagram of the appearance of the section structure of carrier of embodiment of the present invention 4 and recoding/reproduction information, and Fig. 6 B is the enlarged drawing of the recording layer of the carrier shown in Fig. 6 A.
Fig. 7 be the carrier of the embodiment of the invention when writing down 1 bit energy threshold and the graph of a relation between the pulse width of peak power threshold value and laser.
Fig. 8 be the carrier of comparative example when writing down 1 bit energy threshold and the graph of a relation between the pulse width of peak power threshold value and laser.
Fig. 9 is the key diagram of the appearance of the section structure of an example of existing carrier and recoding/reproduction information.
Embodiment
In carrier of the present invention, the hypothetical record light wavelength is λ 1, then comprise: the 1st fluorophor, having absorbing wavelength is λ 1The 1st light time of/n (n is the integer more than 2) produces the character of the 2nd light; With the photosensitive material (hereinafter to be referred as photosensitive material) of photon mode, absorb above-mentioned the 2nd light and optical constant such as refractive index is changed.The 1st fluorophor to the n photonic absorption sensitivity of recording light greater than the n photonic absorption sensitivity of photosensitive material to recording light.Therefore, carrier of the present invention with on photosensitive material, directly come the recorded information bit to compare by the n photonic absorption, can high sensitivity and carries out recording of information at high speed.In addition, recording sensitivity improves, so even be not the laser that has very high peak power as in the past, also can enough 1 pulses form 1 information bit.
In this manual, photosensitive material is meant the material that produces physical change or chemical change by the effect of light, preferably makes the material of optical constant variations such as refractive index by the effect of light.
In carrier of the present invention, for example recording portion comprises the recording layer more than 1 layer, and recording layer comprises photosensitive material and the 1st fluorophor that is blended in the photosensitive material.
In carrier of the present invention, for example recording portion comprises a plurality of recording layers, and a plurality of recording layers are through stacked to the transparent in fact middle layer of recording light and playback light.In this manual, so-called transparent in fact to recording light and playback light, be meant except the scattering component in recording light and the playback light, recording light and playback light are seen through hardly with absorbing.Specifically, per 1 layer transmissivity is preferably in more than 95%, and transmissivity is better more than 99%.
In carrier of the present invention, for example recording portion also can comprise: auxiliary recording layer comprises the 1st fluorophor; And recording layer, adjacent ground connection configuration with auxiliary recording layer, and comprise photosensitive material.
In carrier of the present invention, for example also can be provided with a plurality of duplexers of forming by recording layer and auxiliary recording layer, between adjacent duplexer, be provided with recording light and the transparent in fact middle layer of playback light.
In carrier of the present invention, for example whole recording portion is a recording layer.In the case, the long side of the thickness of recording layer in record light wavelength and reproduction light wavelength wavelength is more suitable more than 2 times.
In carrier of the present invention, for example suppose that the light wavelength of wiping of shining for the information that writes down on the erasure information recording medium is λ 2If then also to comprise absorbing wavelength be λ to recording portion 2It is then best that the 3rd light time of/n produces the 2nd fluorophor of the 4th light.The 4th light wavelength compares λ 1/ n is long, is comprised in the absorbing wavelength district of photosensitive material of the information that write down.In addition, the 2nd fluorophor is to wiping the n photonic absorption sensitivity of light, greater than the photosensitive material that has write down information to wiping the n photonic absorption sensitivity of light.If recording portion comprises this 2nd fluorophor, then utilize the n photonic absorption to come the sensitivity of erasure information to improve.
In carrier of the present invention, best the 2nd light wavelength is than recording light and reproduce the light wavelength weak point.For example, if the 2nd light wavelength more than 0.3 μ m, 0.5 μ m is with next best.If the 2nd light wavelength more than 0.3 μ m, 0.5 μ m can carry out high density recording with next.
In carrier of the present invention, photosensitive material is higher than photosensitive material to the absorptivity of the 2nd light the absorptivity of recording light and playback light is got final product, if but photosensitive material comes down to transparent then best to recording light and playback light.If it is transparent that photosensitive material comes down to recording light and playback light, then can carry out the three-dimensional information record better and reproduce.
In carrier of the present invention, preferably photosensitive material comprises the material that can absorb the 1st light.If photosensitive material comprises the material that can absorb the 1st light, then recording sensitivity improves, and this wishes most.
In carrier of the present invention, photosensitive material for example adopts photochromic material.As photochromic material, diarylethene etc. is arranged.Photosensitive material also can be side chain type liquid crystal macromolecule or photopolymer.The photosensitive material that comprises in recording layer is under the situation of diarylethene, and recording layer preferably also comprises recording light and playback light are come down to transparent resin.This is because can suppress the crystallization again of diarylethene.In addition, be under the situation of the easy material of crystallization again at the 1st fluorophor, also can suppress the crystallization again of the 1st fluorophor.
In carrier of the present invention, the 1st fluorophor is a crystal grain, if the mean grain size of this crystal grain is less than recording light and reproduce light wavelength then best.If the mean grain size of crystal grain is less than recording light and reproduce light wavelength, then suppressed irradiation loss and scattering loss, can suppress optical loss.
Crystal grain for example is made up of inorganic material.Crystal grain also can be semiconductor material.If the energy gap of semiconductor material more than 2.5eV, 8.3eV is with next best.Hydrogen has been passivated if the crystal grain of being made up of semiconductor material has for example mixed then best.
The 1st fluorophor also can be the organic fluorescence pigment.At the 1st fluorophor is under the situation of organic fluorescence pigment, best if recording layer also comprises recording light and the transparent in fact resin of playback light.If recording layer also comprises recording light and the transparent in fact resin of playback light, then can reduce concentration quenching.If recording light and the transparent in fact resin of playback light are for example comprised dendritic then best.If comprise dendritic, then can suppress the association of adjacent the 1st fluorophor (molecule), suppress the reduction of the luminescence efficiency that concentration quenching causes effectively.If the organic fluorescence pigment comprises distich seven benzene series pigments then is best.
At photosensitive material and the 1st fluorophor all is under the situation of organic material, if bonding the opposing party's material then best on the side chain of a certain square bar material in photosensitive material and the 1st fluorophor.In addition, at photosensitive material, the 1st fluorophor and the 2nd fluorophor is under the situation of organic material, if bonding at least a kind of material in all the other 2 kinds of materials then be best on the side chain of a kind of material selecting from the group that photosensitive material, the 1st fluorophor and the 2nd fluorophor are formed.
According to recording and playback method of the present invention, can on carrier of the present invention, carry out high density recording.
According to the manufacture method of carrier of the present invention, can be easily and make carrier of the present invention at an easy rate.
In the manufacture method of carrier of the present invention, if also comprise following operation: by coating by to recording light and playback light in fact the coating formed of material transparent form the middle layer; Alternately repeat defined amount the formation recording layer operation and to form the operation in middle layer then best.Thus, can be easily and made the carrier of several record layers at an easy rate stacked.
In the manufacture method of carrier of the present invention, also can be in the operation that forms recording layer, the coating that comprises the 1st fluorophor, photosensitive material and the 2nd fluorophor by coating forms recording layer.Wherein, suppose that the light wavelength of wiping of shining for the information that writes down on the erasure information recording medium is λ 2, then the 2nd fluorophor absorbing wavelength is λ 2The 3rd light time of/n produces the 4th light; The 4th light wavelength compares λ 1/ n is long, is comprised in the absorbing wavelength district of photosensitive material of the information that write down; The 2nd fluorophor to the n photonic absorption sensitivity of wiping light greater than the photosensitive material that has write down information to wiping the n photonic absorption sensitivity of light.
According to apparatus for optically recording and reproducing information of the present invention, can be to carrier recorded information of the present invention.
Apparatus for optically recording and reproducing information of the present invention comprises also that preferably outgoing wipes the light source of light.The light source that light is wiped in outgoing is flashlamp preferably.Wipe the light source of light as outgoing,, then can absorb and wipe a plurality of information bits in the lump by multi-photon if comprise flashlamp.
In apparatus for optically recording and reproducing information of the present invention, if the light source of outgoing recording light is a pulsed laser light source, pulse width is that 100 femtosecond to 10 nanoseconds are then best.In addition, if the wavelength of the light source of the wavelength ratio outgoing recording light of the light source of outgoing playback light is short then best.If the wavelength of the light source of the wavelength ratio outgoing recording light of the light source of outgoing playback light is short, then further densification.
In apparatus for optically recording and reproducing information of the present invention, preferably by the order of the information bit that has write down in the obstructed overwriting portion, three-dimensional ground recorded information bit on the recording portion of recording medium.For example, preferably from the recording portion of carrier further from the position of object lens to more near the position of object lens recorded information bit successively.If come the recorded information bit, then can reduce parasitic lights such as scattered light that information bit causes or useless refract light by this order.
In apparatus for optically recording and reproducing information of the present invention, if the light source of the light source of outgoing recording light and outgoing playback light is shared then best.Light source becomes one, and it is simple that the structure of apparatus for optically recording and reproducing information becomes.
(embodiment 1)
With Fig. 1～Fig. 3 the carrier of embodiment of the present invention 1 and manufacture method thereof and recording and playback method, apparatus for optically recording and reproducing information are described.
Figure 1A shows the section structure of carrier of present embodiment and the appearance of record and information reproduction.Figure 1B is the enlarged drawing of the recording layer shown in Figure 1A.Fig. 2 shows the sectional drawing of each manufacturing process of the carrier of present embodiment.Fig. 3 shows the schematic configuration of optical head of the apparatus for optically recording and reproducing information of present embodiment.
Shown in Figure 1A, the carrier of present embodiment has formed recording portion 3 and protective seam 4 on substrate 9.Recording portion 3 comprises a plurality of recording layer 1a～1f and a plurality of middle layer 2a～2e, and recording layer and middle layer are alternately stacked.That is, on recording portion 3, from substrate 9 sides, stacked gradually recording layer 1a, middle layer 2a, recording layer 1b ..., recording layer 1e, middle layer 2e, and recording layer 1f.The carrier of present embodiment is by comprising a plurality of recording layers in recording portion 3, except the plane information record, can also be on thickness direction recorded information.Below be called recording layer 1 during any recording layer in describing recording layer 1a～1f, be called middle layer 2 during any middle layer in describing middle layer 2a～2e.
Shown in Figure 1A, the carrier of present embodiment is when recorded information and during information reproduction, and protective seam 4 becomes the light incident side of light.In when record, laser is converged to some (converging light 7), formation information bits 5 gone up among recording layer 1a～1f with object lens 6.When reproducing, laser 8 usefulness object lens 6 are converged to the recording layer 1a～1f last (converging light 7) of expectation, utilize the light that information bit 5 reflects to come information reproduction.
Figure 1B is the enlarged drawing in recording layer 1 (in the zone 12 shown in Figure 1A).Recording layer 1 is dispersed in the 1st fluorophor 11 in the photosensitive material 10 and forms.If photosensitive material 10 and the 1st fluorophor 11 roughly mix equably then are best in recording layer 1.
The hypothetical record light wavelength is λ 1, then to have absorbing wavelength be λ to the 1st fluorophor 11 1Produce during the light of/n (the 1st light) and compare λ 1/ n is the character of long wavelength's light (the 2nd light) more.And photosensitive material 10 has and can absorb the 2nd light, absorbs the character that optical constant changes behind the 2nd light.In addition, photosensitive material 10 has selected absorptivity to the 2nd light to be higher than material to the absorptivity of recording light and playback light.The n photonic absorption sensitivity of 11 pairs of recording light of the 1st fluorophor is greater than the n photonic absorption sensitivity of 10 pairs of recording light of photosensitive material.Therefore, be λ with wavelength 1Recording light shine recording layer 1, cause that (wavelength is λ as making the 1st fluorophor 11 absorb the 1st light 1/ n) the same phenomenon, be the n photonic absorption, the 2nd light that makes photosensitive material 10 absorb 11 generations of the 1st fluorophor comes recorded information bit 5, with on photosensitive material 10, directly come the recorded information bit to compare by the n photonic absorption, can high sensitivity and carries out recording of information at high speed.
The n photonic absorption comprises two-photon absorption (n=2) and multi-photon absorbs (n is the integer more than 3).In two-photon absorption, absorb roughly square being directly proportional of sensitivity and light intensity, and absorption sensitivity is directly proportional with the roughly n power of light intensity in multi-photon absorbs.In addition, the absorptivity of 11 pairs the 1st light of the 1st fluorophor is got over greater than the absorptivity to recording light, the then easy more non-linear phenomenas such as two-photon absorption or multi-photon absorption that take place on the high convergent point of optical power density.Consequently, can form good information bit 5.
The carrier of present embodiment is shown in Figure 1B, the 1st fluorophor 11 and photosensitive material 10 in recording layer, have been mixed equably, so compare with the carrier of embodiment 2 described later, the distance between the 1st fluorophor 11 and the photosensitive material 10 is nearer.Therefore, can form the clearer information bit of profile.
When record, photosensitive material 10 absorbs at least a portion of the 2nd light of the 1st fluorophor 11 generations, optical constant such as refractive index or absorption spectrum changes (part that optical constant changes becomes information bit 5) and for example make, but under the situation of carrying out three-dimensional record, consider that from the angle that its optical loss is few the variation of optical constant is change of refractive preferably.And the 1st fluorophor 11 optical constants own do not change, and are used for improving recording sensitivity as catalyst.
Directly for example come in the existing carrier of recorded information bit by two-photon absorption on photosensitive material 10, the absorbing wavelength of photosensitive material 10 need comprise half wavelength of record light wavelength (below be also referred to as " recording wavelength ").And in the carrier of present embodiment, the absorbing wavelength of photosensitive material 10 need not to comprise half wavelength of record light wavelength, and the wavelength of the 2nd light (fluorescence) is comprised in the absorbing wavelength of photosensitive material 10 and gets final product.Generally, fluorophor is selected the degree of freedom height than the material of photosensitive material, so in the carrier of present embodiment, the selection degree of freedom of recording wavelength improves.
In the carrier of present embodiment, if select the 1st fluorophor 11, make the 2nd light wavelength than recording wavelength and reproduce these two wavelength of light wavelength (below be also referred to as " playback wavelength ") and all lack, then can high density recording, best.Specifically,, make the 2nd light wavelength, be more preferably that 0.15 μ m is above, 0.5 μ m is with next best for example more than the 0.3 μ m, below the 0.5 μ m if select the 1st fluorophor 11.
As photosensitive material 10, the material that for example can use photochromic material, side chain type liquid crystal macromolecule or photopolymer etc. to write down with photon mode.In photochromic material, can wipe the information that has write down, can carry out rewriting (R/W) record.Photochromic material for example has diarylethene, spiro-pyrans, redox pigment (viologen) etc. and their derivant.For example, in the side chain type liquid crystal macromolecule that the bonding liquid crystal forms on the side chain of azobenzene, the variations in refractive index of the information bit 5 behind the record is (for example Δ n=0.2～0.5) greatly, can increase the S/N of playback light, and this point better.In addition, can write down the polarization direction, recording capacity can be increased to roughly 2 times.Photopolymer is fit to write once recording, can carry out stable record.In addition, as the used photosensitive material 10 of the carrier of present embodiment, absorbing wavelength more suitable in the scope of 0.3 μ m～0.5 μ m.
If especially comprise can form to thermally-stabilised, to the high recording layer of the permanance of duplicate record, have five-ring heterocycles as the diarylethene of aryl then best.In above-mentioned diarylethene, also comprise various derivants.Specifically, have 1, two [2-methyl benzo [b] thiene-3-yl-s]-3 of 2-, 3,4,4,5,5-hexafluoro-1-cyclopentene, 2,3-two (2,4,5-trimethyl-3-thienyl)-maleic anhydride, 2,3-two (2,4,5-trimethyl-3-thienyl)-maleimide), cis-1,2-three cyanogen-1, two (2,4, the 5-trimethyl-3-thienyl) ethene (1 of 2-, 2-Bis[2-methylbenzo[b] thiophen-3-yl]-3,3,4,4,5,5-hexafluoro-1-cyclopentene, 2,3-Bis (2,4,5-trimethyl-3-thienyl)-maleic Anhydride, 2,3-Bis (2,4,5-trimethyl-3-thienyl) maleimide, cis-1,2-Dicyano-1,2-bis (2,4,5-trimethyl-3-thienyl) ethene) etc., still be not limited to these.
In that diarylethene is used as under the situation of photosensitive material 10, if recording layer 1 also comprises recording light and the transparent in fact resin of playback light, then can suppress the crystallization again of diarylethene, best.As above-mentioned resin, PMMA and ultraviolet curable resin etc. are arranged.Above-mentioned resin and the weight ratio between the diarylethene in the recording layer 1 are more suitable about 10: 100～100: 100.
In addition, photosensitive material 10 has at least a portion that absorbs the 2nd light that the 1st fluorophor 11 produces and character that optical constant such as refractive index or absorption spectrum is for example changed, but also can have the part of the light that absorbs the 1st wavelength simultaneously and character that optical constant is changed.If photosensitive material 10 also can absorb the 1st light, then can enough the 1st light and these two kinds of light of the 2nd light come recorded information, recording sensitivity improves.
That is, the carrier of present embodiment comprises recording portion, and by to recording portion irradiation recording light or playback light writes down or information reproduction, wherein, recording portion comprises: the 1st fluorophor, absorbing wavelength are λ 1The 1st light time of/n produces more long wavelength's the 2nd light of ratio the 1st light; And photosensitive material, absorb the 1st light and the 2nd light and optical constant is changed.
For example, if it is the diarylethene of 0.31 μ m～0.42 μ m that photosensitive material adopts absorbing wavelength, the 1st fluorophor adopts zinc oxide grain (mean grain size is 0.02 μ m), supposes that the 1st light wavelength is 0.33 μ m, and then the centre wavelength of the 2nd light of the 1st fluorophor generation is 0.39 μ m.The 1st light and the 2nd light wavelength all are comprised in the absorbing wavelength (0.31 μ m～0.42 μ m) of diarylethene, so diarylethene can absorb the 1st light and the 2nd light.
In this carrier,, also can improve recording sensitivity even the 1st fluorophor is not more than photosensitive material to the n photonic absorption sensitivity of recording light.If the 1st fluorophor is to the n photonic absorption sensitivity of recording light, greater than the n photonic absorption sensitivity of photosensitive material to recording light, then recording sensitivity further improves, so best.
In addition, photosensitive material 10 has at least a portion that absorbs the 2nd light that the 1st fluorophor 11 produces and character that optical constant such as refractive index or absorption spectrum is for example changed, and more long wavelength's recording light or playback light is transparent in fact but preferably contrast the 2nd light.On the other hand, the absorptivity of 11 pairs the 1st light of the 1st fluorophor is greater than the absorptivity to recording light and playback light, if but the 1st fluorophor 11 is also transparent in fact then best to recording light and playback light.Like this, if photosensitive material 10 and 11 pairs of recording light of the 1st fluorophor and playback light are transparent in fact, then recording light and playback light less damply the irradiation side of the light from recording portion 3 arrive away from side.Therefore, can carry out three-dimensional information record and reproduction better.
At the 1st fluorophor 11 is under the situation of crystal grain, if its mean grain size is fully less than recording wavelength and playback wavelength then best.This is to prevent optical loss because can suppress diffraction.And then, if mean grain size less than the wavelength of the short side in recording wavelength and the playback wavelength 1/4 best.Not only can suppress diffraction loss in certain degree ground, and can suppress scattering loss in certain degree ground, reduce parasitic light, improve the light utilization ratio.If select the 1st fluorophor and photosensitive material, make refringence between crystal grain and the photosensitive material for example below 0.5 and then below 0.3, then scattering loss can be reduced to no problem in fact degree, the light utilization ratio further improves.In the case, also comprise a part of aggegation of crystal grain and have apparent particle diameter ratio recording wavelength and the situation of the crystal grain (aggegation piece) that playback wavelength is longer.In addition, be more preferably, though in the crystal grain aggegation situation under, the apparent particle diameter is also short than recording wavelength and playback wavelength under the state of aggegation.
At recording layer 1 is that the volume ratio between photosensitive material 10 and the crystal grain 11 is more suitable about 100: 1～100: 200 under the situation of the film below for example about 1 μ m.If volume ratio is in above-mentioned scope, then the scattering loss that causes of crystal grain not too is a problem, and recording sensitivity is in can practical level.If particularly above-mentioned volume ratio is 100: 60～100: 140 then best.Information bit 5 be by photosensitive material 10 absorb the 2nd light that produces by the 1st fluorophor 11, the optical constant that makes photosensitive material 10 changes and forms, so can think that the 1st fluorophor 10 is many more, then recording sensitivity is high more, if but the 1st fluorophor 11 is too much, then photosensitive material 10 is very few, refractive index variable quantity is too small, is difficult to form information bit 5.If above-mentioned volume ratio is 100: 60～100: 140, then recording sensitivity is good, can form good information bit 5, and is best.
In fluorophor, the two-photon absorption sensitivity to the recording light of provision wavelengths that has is far longer than photosensitive material.Specifically, in the 1st fluorophor described later, the two-photon absorption sensitivity that has is up to tens～several thousand times of the two-photon absorption sensitivity of diarylethene (photosensitive material).Absorbing by multi-photon in the carrier of recorded information, selection can absorbing wavelength be λ 1The 1st light of/n (n is the integer more than 3) and the n photonic absorption sensitivity of recording light the 1st fluorophor 11 greater than photosensitive material 10 got final product.
The 1st fluorophor 11 for example can adopt inorganic material.By adopting inorganic material, can form environment resistant good recording layer.So the fluorescence of especially direct transition type semiconductor material production and the corresponding wavelength of its energy gap is best.This characteristic is suitable for absorbing by two-photon absorption or multi-photon and forms information bit 5.If indirect transition N-type semiconductor N material for example its mean grain size then because quantum size effect produces fluorescence according to its crystallite dimension, is particularly suitable for as the 1st fluorophor 11 below about 10nm.If adopt energy gap at the semiconductor material more than the 2.5eV, below the 8.3eV, then the 2nd light wavelength can be set in more than the 0.15 μ m, below the 0.5 μ m, can carry out high density recording.
If the mean grain size of semiconductor grain is for example little to tens nm, then have many surface states.If crystal grain has many surface states, then because the defective on surface, the radiationless inactivation of exciton and be difficult to produce fluorescence (the 2nd light).Therefore, if semiconductor grain has been passivated then is best.If semiconductor grain is passivated, then can improve the generation of the 2nd light, recording sensitivity improves.The method of passivation is various, and the method that adopts pulsed modulation high-frequency induction plasma and doped with hydrogen (making the hydrogen of high concentration be dissolved in method in the crystal grain) etc. is for example arranged.
As direct transition type semiconductor crystal grain, for example having from energy gap is that 3.2eV (wavelength of fluorescence (below be also referred to as " wavelength of fluorescence ") is 0.39 μ m) zinc paste (ZnO), energy gap is the gallium nitride (GaN) of 3.62eV (wavelength of fluorescence is 0.34 μ m), energy gap is the zinc selenide (ZnSe) of 2.6eV (wavelength of fluorescence is 0.48 μ m), energy gap is the aluminum phosphate (AlP) of 2.5eV (wavelength of fluorescence is 0.5 μ m), energy gap is the zinc sulphide (ZnS) of 3.6eV (wavelength of fluorescence is 0.34 μ m), and energy gap is at least a kind that selects in the group formed of the cadmium sulfide (CdS) of 2.5eV (wavelength of fluorescence is 0.5 μ m).
Comprise at photosensitive material under the situation of diarylethene, from ZnO, GaN, and the group formed of ZnS select a kind best.These wavelength of fluorescence are comprised in the absorbing wavelength (wavelength photoreceptor) of diarylethene.
As indirect transition N-type semiconductor N crystal grain, for example have from silicon (Si), germanium (Ge), tin oxide (SnO 2), titanium dioxide (TiO 2), tungsten oxide (WO 3), strontium titanates (SrTiO 3), silit (SiC), and indium oxide (In 2O 3) select in the group formed at least a kind.The mean grain size of indirect transition N-type semiconductor N crystal grain is best below about 10nm.Mean grain size is more little, then produces the short more fluorescence of wavelength (the 2nd light), so can carry out high density recording.If mean grain size greater than 30nm～50nm, then is difficult to produce fluorescence.
As other inorganic material that can be used for the 1st fluorophor 11, for example have wavelength of fluorescence be 0.39 μ m europium activation strontium pyrophosphate magnesium ((Sr, Mg) 2P 2O 7: Eu) or wavelength of fluorescence be barium silicate of 0.35 μ m etc.This is because they produce the efficient height of fluorescence.
The 1st fluorophor also can adopt organic material.Organic material for example has the organic fluorescence pigment.In the organic fluorescence pigment, wavelength of fluorescence (the 2nd light wavelength) is comprised in 2 among 0.3 μ m～0.5 μ m, and (2 , 5 -distiches such as didecyl-p-septphenyl seven benzene series pigments are best for 5 -didecyl distich seven benzene.This is because can carry out high density recording.
Distich seven benzene series pigments are being used as under the situation of the 1st fluorophor, if the 1st light wavelength for example is set in 0.20 μ m～0.38 μ m, then to produce centre wavelength be that the fluorescence of 0.39 μ m (wavelength of fluorescence is 0.36 μ m～0.45 μ m) is as the 2nd light to distich seven benzene series pigments.In the case, to select absorbing wavelength be that the material of 0.36 μ m～0.45 μ m gets final product for photosensitive material 10.In addition, in the record that is undertaken by two-photon absorption, recording wavelength is selected to get final product in the scope of 0.4 μ m～0.76 μ m.
As other organic fluorescence pigments, para-terpheny (p-Terphenyl is arranged, wavelength of fluorescence is 0.34 μ m), TMQ (wavelength of fluorescence is 0.35 μ m), BPBD-365 (wavelength of fluorescence is 0.365 μ m), PBD (wavelength of fluorescence is 0.366 μ m), PPO (wavelength of fluorescence is 0.372 μ m), to quaterphenyl (p-Quaterphenyl, wavelength of fluorescence is 0.374 μ m), Exalite377E_ (wavelength of fluorescence is 0.377 μ m), Exalite392E (wavelength of fluorescence is 0.392 μ m), Exalite400E (wavelength of fluorescence is 0.397 μ m), Exalite351 (wavelength of fluorescence is 0.351 μ m), Exalite376 (wavelength of fluorescence is 0.376 μ m), Exalite384 (wavelength of fluorescence is 0.384 μ m), Exalite389 (wavelength of fluorescence is 0.389 μ m), Exalite392A (wavelength of fluorescence is 0.392 μ m), Exalite398 (wavelength of fluorescence is 0.398 μ m), Exalite404 (wavelength of fluorescence is 0.404 μ m), Exalite411 (wavelength of fluorescence is 0.411 μ m), Exalite416 (wavelength of fluorescence is 0.416 μ m), Exalite417 (wavelength of fluorescence is 0.417 μ m), Exalite428 (wavelength of fluorescence is 0.428 μ m), BBQ (wavelength of fluorescence is 0.38 μ m), LD390 (wavelength of fluorescence is 0.39 μ m), α-NPO (wavelength of fluorescence is 0.4 μ m), PBBO (wavelength of fluorescence is 0.4 μ m), DPS (wavelength of fluorescence is 0.406 μ m), BBO (wavelength of fluorescence is 0.41 μ m), POPOP (wavelength of fluorescence is 0.419 μ m), two-MSB_ (wavelength of fluorescence is 0.421 μ m), stilbene 420 (Stilbene, wavelength of fluorescence is 0.42 μ m), LD423 (wavelength of fluorescence is 0.423 μ m), LD425 (wavelength of fluorescence is 0.425 μ m), cumarin 440 (Coumarin440, wavelength of fluorescence are 0.44 μ m), cumarin 445 (wavelength of fluorescence is 0.445 μ m), cumarin 450 (wavelength of fluorescence is 0.45 μ m), cumarin 460 (wavelength of fluorescence is 0.46 μ m), cumarin 466 (wavelength of fluorescence is 0.466 μ m), cumarin 473 (wavelength of fluorescence is 0.473 μ m), cumarin 478 (wavelength of fluorescence is 0.478 μ m), cumarin 480 (wavelength of fluorescence is 0.48 μ m), cumarin 481 (wavelength of fluorescence is 0.481 μ m), cumarin 485 (wavelength of fluorescence is 0.485 μ m), cumarin 487 (wavelength of fluorescence is 0.487 μ m), LD489 (wavelength of fluorescence is 0.489 μ m), cumarin 490 (wavelength of fluorescence is 0.49 μ m), LD490 (wavelength of fluorescence is 0.49 μ m), cumarin 498 (wavelength of fluorescence is 0.498 μ m), cumarin 500 (wavelength of fluorescence is 0.5 μ m) etc.
At photosensitive material and the 1st fluorophor all is under the situation of organic material, only need their are mixed mutually getting final product recording layer 1 in, if still the 1st fluorophor is bonded on the side chain of photosensitive material or photosensitive material is bonded on the side chain of the 1st fluorophor then best.Like this, form recording layer if be used in the compound that bonding the opposing party material forms on the side chain of a certain square bar material in photosensitive material and the 1st fluorophor, then both are adjacent, so recording sensitivity further improves.In addition, need not to form as the 1st fluorophor that mixes photosensitive material and grains the situation of recording layer, homogeneity is mixed the 1st fluorophor of photosensitive material and grains well.Therefore, the making of recording layer becomes easy.For example, be under the situation of diarylethene at photosensitive material 10, the 1st fluorophor is distich seven benzene series pigments preferably.This is because the centre wavelength of the wavelength of fluorescence of distich seven benzene series pigments is roughly consistent with the centre wavelength of the absorbing wavelength of diarylethene.
If forming cooperation ratio above-claimed cpd, between photosensitive material and the 1st fluorophor is that with respect to photosensitive material 100 mass parts, the 1st fluorophor has 10～50 mass parts then best.This be because, if the amount of photosensitive material is very few, then refractive index variable quantity is too small, if the amount of the 1st fluorophor is very few, the effect of the recording sensitivity that then can not fully be improved.
(2a～2e) preferably uses from the 1st light wavelength (λ in a plurality of middle layers 2 1/ n) wavelength zone (the λ of the wavelength of the big side in recording wavelength and the playback wavelength 1/ n～λ 1Or playback wavelength) light material transparent in fact forms.If middle layer 2 pairs the 1st light, recording light and playback lights are transparent in fact, then the 1st light, recording light and playback light less damply the irradiation side of the light from recording portion 3 arrive away from side.Therefore, carry out three-dimensional information record and reproduction easily.
As the material in middle layer 2, for example can adopt ultraviolet curable resin, PMMA, vibrin etc.In addition, in recording layer 1, added under the situation of resin for the purpose of the crystallization again that suppresses photosensitive material or the 1st fluorophor, if use the resin identical in fact to form the middle layer with this resin, then on the interface between recording layer and the middle layer, can suppress chemical reaction, for example generation of problem such as corrosion, best.Here, what is called is identical materials in fact, is meant allied substances, also is identical materials even for example make under the different situation of molecular weight in the difference because of the degree of polymerization.
Substrate 9 and protective seam 4 for example can wait with polycarbonate, PMMA, norbornene resin or cyclenes resin and form.
Then, lift the recording and playback method that concrete example illustrates present embodiment to carrier.Following concrete example is the example that is recorded as prerequisite to be undertaken by two-photon absorption.
As the 1st fluorophor 11, for example adopted semiconductor material---zinc paste (ZnO) crystal grain; As photosensitive material 10, for example adopted diarylethene.Diarylethene is the recording materials that can use up the photon mode that writes down.The mean grain size of zinc oxide grain less than recording wavelength (for example 0.66 μ m) and playback wavelength (for example 0.63 μ m), for example is 0.01 μ m～0.03 μ m fully.The absorbing wavelength of diarylethene is 0.31 μ m～0.42 μ m.Zinc oxide grain in the recording layer 1 and the volume ratio between the diarylethene are as being made as about 10: 100～100: 100.
Zinc oxide grain (the 1st fluorophor) causes opaque to wavelength wide below about 0.38 μ m.Therefore, under with the situation that is recorded as prerequisite of being undertaken by two-photon absorption, the 1st light wavelength gets final product below 0.38 μ m, in this example, is made as 0.33 μ m.
Peak power is about 1W～400W, for example little recording light to 100 femtoseconds～10 nanoseconds of pulse width if for example shine to recording layer 1, then recording light is assembled by object lens 6, upward produce the effect that becomes half (for example 0.33 μ m) as recording wavelength (for example 0.66 μ m) in the high part of the power density of light (convergent point), zinc oxide grain (the 1st fluorophor 11) produces the 2nd light (for example 0.39 μ m).Then, diarylethene (photosensitive material 10) absorbs the 2nd light.Diarylethene is by absorbing the single photon of the 2nd light, and its optical constant, for example variations in refractive index have write down information bit 5.The 2nd light wavelength for example is 0.39 μ m, so can carry out high density recording.Certainly the single photon of diarylethene absorbs highly sensitive in two-photon absorption sensitivity.
The light that 1 pair of wavelength of this recording layer is 0.6 μ m almost is transparent, so when reproducing, if adopt can outgoing than 0.6 μ m more the long wavelength, for example wavelength is the semiconductor laser of the light of 0.63 μ m, then can reduce the optical loss by the playback light of a plurality of recording layers 1.
Then, with Fig. 2 A～Fig. 2 D the manufacture method of the carrier of present embodiment is described.
At first, prepared substrate 9 (with reference to Fig. 2 A) on substrate 9, for example applies the coating that comprises photosensitive material and the 1st fluorophor with methods such as spin coatings and forms recording layer 1a (with reference to Fig. 2 B).And then for example form middle layer 2a (with reference to Fig. 2 C) thereon by the coating that comprises the material in middle layer with the coating of methods such as spin-coating method.And then repeat to form recording layer 1b, middle layer 2b, recording layer 1c thereon equally ..., recording layer 1f.At last, the applying coating that will comprise the material of protective seam 4 forms protective seam 4 to recording layer 1f, perhaps forms protective seam 4 (with reference to Fig. 2 D) with film forming method etc. on recording layer 1f.Like this, form recording layer and middle layer by coating material, can be easily and make the carrier of present embodiment at an easy rate.
In addition, also can form middle layer or recording layer superfluously, with the part that a forms part part, light incident side of recording portion 3 (promptly as) superfluously as protective seam 4.That is, also can on recording layer 1f, further form with the same layer of middle layer 2a～2e as protective seam 4, perhaps form recording layer 1f thickly and with its part as protective seam 4.If do like this, then need not to use the operation different to form protective seam 4 with recording portion 3, protective seam 4 is adopted and recording portion identical materials in fact.
The apparatus for optically recording and reproducing information and the recording and playback method of present embodiment then, are described.
As shown in Figure 3, on the optical head of the apparatus for optically recording and reproducing information of present embodiment, be provided with reproduce with and record with these two kinds of light source 20a, 20b, 22 light path, beam splitter 18a, 18b, collimation lens 16, focus error signal/tracking error signal detecting element 15 have been disposed, to upper reflector 121, spherical aberration correction element 13, object lens 6 from light source 20a, 20b to carrier.Light source 20a is that wavelength for example is the used again semiconductor laser light resource of 0.63 μ m, and light source 20b is that wavelength for example is that 0.66 μ m, pulse width for example are the recording semiconductor pulsed laser light source of 100 femtoseconds～10 nanoseconds.
In the apparatus for optically recording and reproducing information of present embodiment, be respectively equipped with recording light source and used again light source, but also can come recording light source of double as and used again light source with a light source.In the case, if for example adopting wavelength is the light source of 0.66 μ m, be set to when writing down, carrying out impulse hunting and come the big laser of outgoing peak power, come the little laser of outgoing peak power and when reproducing, carry out continuous oscillation, then can realize the record and the reproduction of the carrier of present embodiment.If come recording light source of double as and used again light source with a light source, then the structure of apparatus for optically recording and reproducing information becomes simpler.
In the record that is undertaken by two-photon absorption, the threshold value of the energy that the peak power height then writes down reduces, very favourable, but along with the pulse width of recording laser is elongated, the threshold value of the peak power of 1 bit of record has the tendency (wherein, the threshold value of record energy increases) of reduction on carrier 22.This be because, if the pulse width of laser is elongated, the then corresponding increase of energy.If carry out record, then can simplify the structure of the semiconductor laser of recording light source 20b with lower peak power.If peak power for example at 50W with next best in practicality.Therefore, pulse width preferably is made as more than 6 psecs, below 10 nanoseconds.The threshold value of energy is the value that the pulse width of laser multiply by peak power threshold value gained.
When record, 21b is folded into the y direction of principal axis by beam splitter 18a from light source 20b emitting laser, become almost parallel light by collimation lens 16, after seeing through diffraction type focus error signal/tracking error signal detecting element 15 (utilizing 0 order diffraction light), by light path being folded into the z direction of principal axis to upper reflector 121.Then, be folded into the axial laser of z 8, converge to by object lens 6 on the recording portion 3 of carrier 22 (converging light 7), as shown in Figure 1, form information bit 5 (with reference to Fig. 1) by after the spherical aberration correction element 13.Information bit 5 utilizes the variation of the optical constant of recording layer to form, and in the present embodiment, mainly is to utilize the variations in refractive index of photosensitive material 10 to write down.Utilize variations in refractive index to come recorded information, can reduce the absorption loss of light.
When reproducing, see through beam splitter 18a and 18b from light source 20a emitting laser 21a, become almost parallel light by collimation lens 16, through behind diffraction type focus error signal/tracking error signal detecting element 15 (utilizing 0 order diffraction light), by light path being folded into the z direction of principal axis to upper reflector 121.Then, the axial laser 8 of crooked folding z is by after the spherical aberration correction element 13, converged to by object lens 6 on the recording portion 3 of carrier 22 (converging light 7).
Go back in the other direction by the information bit laser light reflected, successively by object lens 6, spherical aberration correction element 13, to upper reflector 121, branch into a plurality of light by diffraction type focus error signal/tracking error signal detecting element 15 and (utilize 1 order diffraction light.Wherein, in Fig. 3 in order to simplify, not shown branched optical cable on from diffraction type focus error signal/tracking error signal detecting element 15 to the light path of beam splitter 18b.), become converging light by collimation lens 16, and then deflect into-the z direction of principal axis by beam splitter 18b.Deflect into-the axial a plurality of branched optical cable 17a～17c of z are by behind each pin hole 14a～14c of pinhole array 14, detect by photodetector 19a～19c.
In addition, in the present embodiment, the pinhole array 14 that will have a plurality of pin holes is arranged on the position of roughly focus of whole branched optical cable 17a～17c, but also each pin hole can be configured on the position corresponding with each focus of branched optical cable 17a～17c.Size by making pin hole 14a～14c can only detect the light of the central part of converging light 17a～17c less than each branched optical cable 17a～17c, removes near the useless high order aberration light of the distribution periphery of converging light 17a～17c.Thus, the S/N of reproducing signal not only can be improved, even the S/N of servo error signal can also be improved.
If the Zhou Bianguang of deletion branched optical cable 17a～17c, then light quantity reduces, so detecting device 19a～19c preferably adopts APD (avalanche photodide) to come enhancing signal intensity in the case.Under the situation of the carrier that comprises a plurality of recording layers, because the restriction of material, the detection light quantity can not obtain very big, so also preferably adopt APD for this reason.
In addition, not to make the size of pinhole array 14a～14c, but come detection branches light 17a～17c respectively, can obtain same effect yet with the area photodetector 19a～19c littler than branched optical cable 17a～17c less than branched optical cable 17a～17c.
Moreover, also can only make branched optical cable 17b, the 17c corresponding pin hole 14b, 14c by pinhole array 14 with tracking error signal, come detection branches light 17b, 17c with photodetector 19b, 19c, the branched optical cable 17a obstructed needle passing hole corresponding with focus error signal for example directly detects with the four photodetector 19a of cutting apart.In this configuration, as the focus detection method, for example can adopt method of astigmatism.In addition, if the area of photodetector 19a then can reduce the high order aberration component less than the sectional area of the branched optical cable 17a on the detection position at this moment.
In the present embodiment, as object lens 6, having adopted numerical aperture NA greatly, for example is 0.85 simple lens, but object lens 6 also can be made 2 pieces one group.
In the present embodiment, by the order by the information bit 5 that write down not, three-dimensional ground recorded information bit 5 successively in recording portion 3.By carrying out record, can reduce parasitic lights such as the scattered light that information bit 5 causes, useless diffraction light by this order.Specifically, by from the recording layer (among Fig. 1, being recording layer 1a) that disposes away from the position of object lens 6 successively near recording layer formation information bit 5, can realize said sequence.On carrier shown in Figure 1, press recording layer 1a, recording layer 1b, recording layer 1c ... edge-z direction of principal axis writes down three-dimensionally and gets final product like that.At this moment, the thickness of the recording layer 1 that converging light 7 is passed through is different because of the registered depth of information bit 5, so the most handy from light source 20b to object lens set spherical aberration correction element 13 6 the light path, on one side control amount of spherical aberration according to registered depth and carry out record on one side.Thus, can form good information bit 5.Spherical aberration correction element 13 can adopt the variable liquid crystal cell of configuration index distribution arranged side by side or combination concavees lens and convex lens and change the micromachine etc. that the optical beam expander at two intervals of lens on optical axis direction or distorting lens or reflection micro mirror, control light phase come correcting spherical aberration with actuator.
For the record order, under the situation of the non-recorded part that has information bit 5, if converging light 7 information bit 5 not by having write down, then be not be all the time-the z direction of principal axis also can.
Moreover if carry out in the apparatus for optically recording and reproducing information of recording of information and reproduction at the carrier that photosensitive material has been adopted photochromic material, it is then best to carry the light source of wiping usefulness.If carried the light source of wiping usefulness, then can realize rewritable apparatus for optically recording and reproducing information.Utilizing two-photon absorption to come under the situation of erasure information, for example can adopt wavelength is the impulse semiconductor laser of wiping usefulness of 0.98 μ m.The photosensitive material that comprises in carrier for example is under the situation of diarylethene, and the diarylethene behind the record (having formed the diarylethene at the position of information bit) absorbs green light.If being the light of 0.49 μ m then information bit, the diarylethene absorbing wavelength behind the record is wiped free of.In addition, if with wavelength be the flashlamp etc. of the green LED (LED) of 450nm～580nm or the light that emission comprises green light as wiping the light source of usefulness, then can utilize single photon to absorb and wipe a plurality of information bits in the lump.
(embodiment 2)
With Fig. 4 A and Fig. 4 B the carrier of embodiment of the present invention 2 and manufacture method thereof and recording and playback method, apparatus for optically recording and reproducing information are described.
Fig. 4 A shows the section structure of carrier of present embodiment and the appearance of record and information reproduction.Fig. 4 B is the enlarged drawing of the recording layer shown in Fig. 4 A.
As shown in Figure 4, the carrier of present embodiment has formed recording portion 33 and protective seam 34 on substrate 39.Recording portion 33 is that the duplexer of stacked a plurality of recording layers and auxiliary recording layer through the middle layer forms.That is, on recording portion 33,, auxiliary recording layer 37a, recording layer 31a, middle layer 32a, auxiliary recording layer 37b, recording layer 31b, middle layer 32b have been stacked gradually from substrate 39 sides ..., middle layer 32e, auxiliary recording layer 37f and recording layer 31f.The carrier of present embodiment except the plane information record, can also overlapping multilayer carry out recording of information by comprise a plurality of recording layers in recording portion 33 on thickness direction---can carry out three-dimensional record.Below, be called recording layer 31 during any recording layer in describing recording layer 31a～31f, be called middle layer 32 during any middle layer in describing middle layer 32a～32e, be called auxiliary recording layer 37 during any auxiliary recording layer in describing auxiliary recording layer 37a～37f.
Fig. 4 B is the enlarged drawing of recording layer 31 and auxiliary recording layer 37 (in the zone 36 shown in Fig. 4 A).Shown in Fig. 4 B, auxiliary recording layer 37 and recording layer 31 be adjacent to fetch setting.Recording layer 37 is that the 1st fluorophor 42 with grains is dispersed in as forming in resin 40 grades of binder, and recording layer 31 is formed by photosensitive material.Recording layer 31 for example also can comprise PMMA or ultraviolet curable resin etc. to recording light and the transparent in fact resin of playback light except photosensitive material.The resin that comprises in the auxiliary recording layer 37 (binder) if can the hold the record shape of auxiliary layer 37 of amount, have no particular limits, for example comprise about 1 percent by volume～10 percents by volume and get final product.
Above-mentioned resin (binder) need come down to transparent to recording light and playback light.Binder need not material that fluorescence (the 2nd light) that to be optical constant produce according to the 1st fluorophor 42 changes, be on the contrary do not change best.This is because in the carrier of present embodiment, be not above-mentioned resin (binder) as recording materials, but at recording layer 31 enterprising line items.As above-mentioned resin (binder), PMMA, polymethyl acrylate, polycarbonate, polystyrene, polyvinyl alcohol (PVA) etc. are for example arranged.
Comprising in recording layer in the mode of the 1st fluorophor as the carrier of present embodiment 1, the amount of the photosensitive material that comprises in the recording layer reduces.Photosensitive material changes in optical constants such as recorded information front and back refractive indexes, but fluorophor does not change.Therefore, in recording layer, comprise in the mode of fluorophor, little at the variable quantity of optical constants such as recorded information front and back refractive index.If as the carrier of present embodiment, in recording layer 31, do not comprise fluorophor, the auxiliary recording layer 37 that comprises the 1st fluorophor 42 is set outside recording layer 31, then can increase the variable quantity of the optical constant of recording layer 31.In addition, need not to form as the 1st fluorophor that mixes photosensitive material and grains the mode of recording layer, homogeneity is mixed photosensitive material and the 1st fluorophor well.Therefore, the making of recording layer is easy to.
In Fig. 4 A, shone recording light and playback light from the recording layer side, but be not limited thereto.From auxiliary recording layer side irradiation recording light and playback light, also can write down and information reproduction.
The 1st fluorophor 42 have with embodiment 1 in same character and the function of the 1st fluorophor that comprise in the recording layer 1 of the carrier that illustrated, be same material.In the example shown in Fig. 4 B, the 1st fluorophor 42 is a crystal grain, but is not limited thereto.In addition, the 1st fluorophor 42 also can be an organic material.At the 1st fluorophor 42 is under the situation of organic material, concavo-convex also few even without binder, can form good auxiliary recording layer.
In addition, substrate 39, protective seam 34, and middle layer 32 have substrate 9 in the carrier with embodiment 1, protective seam 4, and the same function in middle layer 2, can form with same material.
The recording and playback method to carrier of present embodiment then, is described.
The carrier of present embodiment is as the recording layer 1 of the carrier of embodiment 1, convergent portion in recording light, bring out non-linear phenomenas such as two-photon absorption on auxiliary recording layer 37, the 1st fluorophor 42 is recording wavelength λ as having absorbed wavelength 1Half light (the 1st light) equally produce the 2nd light (fluorescence).The 2nd light quilt absorbs with the photosensitive material of the recording layer 31 of auxiliary recording layer 37 adjacent settings.The optical constant that has absorbed the photosensitive material 40 of the 2nd light changes, and forms information bit 35.In the carrier of present embodiment, also same with the carrier of embodiment 1, photosensitive material 40 has selected the absorptivity to the 2nd light to be higher than material to the absorptivity of recording light and playback light.In addition, the two-photon absorption sensitivity of 42 pairs of recording light of the 1st fluorophor is greater than the two-photon absorption sensitivity of 40 pairs of recording light of photosensitive material.Therefore, the carrier of present embodiment with on photosensitive material 40, directly come the existing carrier of recorded information to compare by two-photon absorption, can high sensitivity and carries out recording of information at high speed.
It is same to absorb the carrier and the embodiment 1 that write down by multi-photon, and selection can absorbing wavelength be λ 1The 1st light of/n (n is the integer more than 3), 1st fluorophor 42 bigger than the n photonic absorption sensitivity of photosensitive material 40 get final product.
The method of the manufacturing information recording medium of present embodiment and the situation of embodiment 1 are same, preferably form each layer by coating material successively.This is because can make easily and at an easy rate.
In addition, the recording and playback method to carrier of present embodiment is also same with embodiment 1, can carry out recording of information and reproduction by enough apparatus for optically recording and reproducing information shown in Figure 3.Just, in the present embodiment, object lens 6 have adopted 2 pieces one group lens (6a, 6b) (with reference to Fig. 4 A).
(embodiment 3)
With Fig. 5 A and Fig. 5 B the carrier of embodiment of the present invention 3 and manufacture method thereof and recording and playback method, apparatus for optically recording and reproducing information are described.
Fig. 5 A shows the section structure of carrier of present embodiment and the appearance of record and information reproduction.Fig. 5 B is the enlarged drawing of the recording layer shown in Fig. 5 A.
Shown in Fig. 5 A, the carrier of present embodiment has formed recording portion 53 and protective seam 54 on substrate 59.Be that whole recording portion 53 is as recording layer 51 with the difference of the carrier of embodiment 1～3.If the thickness of recording portion 53 (recording layer 51) the record light wavelength and reproduce the long side in the light wavelength wavelength more than 2 times then best.By the string of recorded information bit 55 on the roughly same plane in recording layer 51, a plurality of this virtual record face (51a～51f), realized the three-dimensional information record that are called Bit String are set in recording layer 51.In Fig. 5 A, the 6th, object lens, the 7th, converging light, the 8th, laser.
Fig. 5 B is the enlarged drawing in recording layer 51 (in the zone 56 shown in Figure 6).Shown in Fig. 5 B, recording layer 51 is dispersed in the 1st fluorophor 57 in the photosensitive material 510 and forms.The 1st fluorophor 57 have with embodiment 1 in same character and the function of the 1st fluorophor that illustrated, be same material.In the example shown in Fig. 5 B, the 1st fluorophor 57 is a crystal grain, but is not limited thereto.The 1st fluorophor 57 also can be an organic material.In addition, photosensitive material 510 also have with embodiment 1 in same character and the function of photosensitive material that illustrated, be same material.
As the method for the manufacturing information recording medium of present embodiment, method that the applying coating that will comprise photosensitive material 510 and the 1st fluorophor 57 equally with embodiment 1 forms to the substrate 59 and the method that forms by casting or injection molding are arranged.By these methods, can be easily and make carrier at an easy rate.
In addition, the recording and playback method to carrier of present embodiment is also same with embodiment 1, can carry out recording of information and reproduction by enough apparatus for optically recording and reproducing information shown in Figure 3.
(embodiment 4)
With Fig. 6 A and Fig. 6 B the carrier of embodiment of the present invention 4 and manufacture method thereof and recording and playback method, apparatus for optically recording and reproducing information are described.
Fig. 6 A shows the section structure of carrier of present embodiment and the appearance of record and information reproduction.Fig. 6 B is the enlarged drawing of the recording layer shown in Fig. 6 A.
As shown in Figure 6A, the carrier of present embodiment has formed recording portion 63 and protective seam 64 on substrate 69.Recording portion 63 comprises a plurality of recording layer 63a～63f and a plurality of middle layer 62a～62e, and recording layer and middle layer are alternately stacked.Below, be called recording layer 61 during any recording layer in describing recording layer 61a～61f, be called middle layer 62 during any middle layer in describing middle layer 62a～62e.
As shown in Figure 6A, the carrier of present embodiment is also same with embodiment 1, and when recorded information and during information reproduction, protective seam 4 becomes the light incident side of light.In when record, laser 8 usefulness object lens 6 ( lens combination 6a, 6b) are converged to some (converging light 7), formation information bits 65 gone up among recording layer 1a～1f.When reproducing, laser 8 usefulness object lens 6 ( lens combination 6a, 6b) are converged to the recording layer 61a～61f last (converging light 7) of expectation, utilize the light that information bit 5 reflects to come information reproduction.
Fig. 6 B is the enlarged drawing in recording layer 61 (in the zone 66 shown in Fig. 6 A).What the carrier of present embodiment was different with the carrier of embodiment 1 is that it is λ that recording layer 61 also comprises absorbing wavelength 2The 3rd light time of/n produces more the 2nd fluorophor 68 of long wavelength's the 4th light of ratio the 3rd light.λ 2It is the light wavelength of wiping from the light source outgoing of wiping usefulness.The 4th light wavelength is than absorbing wavelength district, for example λ in the absorbing wavelength district of the photosensitive material 610 that absorbs the information that write down by the fluorescence (the 2nd light) of the 1st fluorophor 67 generations, that be fit to wipe 1/ n is long, and is comprised in the above-mentioned absorbing wavelength district.68 pairs of the 2nd fluorophor are wiped the n photonic absorption sensitivity of light, wipe the n photonic absorption sensitivity of light greater than 610 pairs of the photosensitive materials that has write down information.Therefore, in the carrier of present embodiment, come the sensitivity of wiping of erasure information to improve by two-photon absorption.The 2nd fluorophor 68 and the 1st fluorophor 67 are same, can be any in inorganic material, the organic material.
The 1st fluorophor 67 have with embodiment 1 in same character and the function of the 1st fluorophor that illustrated, be same material.In the example shown in Fig. 6 B, the 1st fluorophor 67 and the 2nd fluorophor 68 are crystal grain, but are not limited thereto.At least one side in the 1st fluorophor 67 and the 2nd fluorophor 68 also can be an organic material.Photosensitive material 610 adopt can erasure information photon mode recording materials, for example diarylethene etc.
Having adopted absorbing wavelength is under the situation of diarylethene of 0.31 μ m～0.42 μ m, and the absorbing wavelength that is fit to the erasure information bit for example is 0.45 μ m～0.57 μ m.Behind record, be the light of 0.45 μ m～0.57 μ m if make information bit 65 absorbing wavelength, then can erasure information.
For example, to write down by two-photon absorption and information reproduction is under the situation of prerequisite, as the 1st fluorophor 67, employing for example produces when for example absorbing the light of wavelength 0.33 μ m (the 1st light) that wavelength is the material of the light (the 2nd light) of 0.34 μ m～0.42 μ m, and the 2nd fluorophor 68 selects to absorb that to produce wavelength for example when wavelength for example is the light (the 3rd light) of 0.49 μ m be that the fluorophor of the light (the 4th light) of 0.50 μ m～0.57 μ m gets final product.In the case, the record light wavelength for example is 0.66 μ m, and reproducing light wavelength for example is 0.63 μ m, and wiping light wavelength is 0.98 μ m.
In the carrier of present embodiment, the 1st fluorophor 67 and the 2nd fluorophor 68 are particularly suitable for adopting the organic fluorescence pigment.The absorbing wavelength district of organic fluorescence pigment is narrow.Therefore, can select the 1st fluorophor 67 and the 2nd fluorophor 68, make and can improve absorbing wavelength and wavelength of fluorescence non-overlapping copies recording sensitivity simultaneously and wipe sensitivity.
If the 1st fluorophor 67 for example adopts distich seven benzene series pigments, it is pigment that the 2nd fluorophor 68 for example adopts the diphenylamine stilbene of 4,4 '-two diphenylamine stilbenes etc., and photosensitive material 610 for example adopts diarylethene then best.This be because, the centre wavelength of the wavelength of fluorescence of distich seven benzene series pigments is roughly consistent with the centre wavelength of the absorbing wavelength of diarylethene, and the diphenylamine stilbene is that the centre wavelength of wavelength of fluorescence of pigment is roughly consistent with the centre wavelength of the absorbing wavelength of the diarylethene that has write down information.In addition, these pigments are mixed in the diarylethene easily, so can form the recording layer of excellent in uniform.
In addition, in recording layer 61,68 of photosensitive material the 610, the 1st fluorophor 67 and the 2nd fluorophor need simple mixing get final product, if but at least a kind of material on the side chain of a kind of material selecting from the group of photosensitive material, the 1st fluorophor and the 2nd fluorophor composition in all the other 2 kinds of materials of bonding then best.So a kind of material selecting from the group that photosensitive material, the 1st fluorophor and the 2nd fluorophor are formed and at least a kind of material adjacency in all the other 2 kinds of materials are recording sensitivity and/or wipe sensitivity and further improve.In addition, need not homogeneity and mix photosensitive material, the 1st fluorophor 67 and the 2nd fluorophor well.Therefore, the making of recording layer becomes easy.
In Fig. 6 A, the multi-ply construction of having adopted recording layer 61 and middle layer 62 alternately stacked, but also can as the carrier of embodiment 3, whole recording portion become recording layer.In addition, also can adopt with photosensitive material the 610, the 1st fluorophor the 67, the 2nd fluorophor 68 be included in respectively in the different layers, stacked their structure.
In addition, in the carrier of present embodiment, recording portion 63 also can comprise: comprise the 1st fluorophor the 1st auxiliary recording layer, comprise the 2nd fluorophor the 2nd auxiliary recording layer and and the 1st auxiliary recording layer and the adjacent respectively ground connection of the 2nd auxiliary recording layer be configured between them, comprise the recording layer of photosensitive material.In the case, also can be provided with a plurality of duplexers of forming by the 1st auxiliary recording layer, the 2nd auxiliary recording layer and recording layer, between the duplexer that adjoins each other, be provided with recording light and the transparent in fact middle layer of playback light.
As the method for the manufacturing information recording medium of present embodiment, the method for alternately carrying out following operation is for example arranged: the applying coating that will comprise photosensitive material, the 1st fluorophor and the 2nd fluorophor forms recording layer to substrate 49; By coating by to recording light and playback light in fact the coating formed of material transparent form the middle layer.
The apparatus for optically recording and reproducing information that carrier is carried out recording of information and reproduction of present embodiment comprises the light source of wiping usefulness.
The recording and playback method to carrier of present embodiment is identical with embodiment 1.
More than, in embodiment 1～4, embodiments of the present invention have been described, but the present invention is not limited to these, also can make up the structure of the carrier of each embodiment and manufacture method thereof and recording and playback method, apparatus for optically recording and reproducing information, also can produce same effect.In addition, in carrier of the present invention and apparatus for optically recording and reproducing information, except comprise can the record type, also comprising can the rewriting type.
In addition, in present embodiment 1 and 4, the carrier that comprises 6 layers of recording layer has been described, but stacked number is not limited thereto, can be in the scope inner stacks more than 2 layers, below 100 layers.
In addition, in embodiment 1～4, be that example has illustrated carrier with the CD, still be applied to the product of card shape or drum type, band shape, be also contained in the scope of the present invention.
Used object lens and collimation lens are for convenience and the name that rises is identical with general said lens in the above-mentioned embodiment.
The embodiment of carrier of the present invention then, is described.The carrier of following embodiment is an example of the carrier shown in Figure 1 that illustrated in the embodiment 1.
(embodiment)
The thickness that has formed rail groove (spacing is that 0.51 μ m, groove depth are the recording groove of groove (groove) of 0.2 μ m) on by the surface is on the substrate 9 formed of the polycarbonate (absorbing wavelength is below the 0.36 μ m) of 1.1mm; alternately forming thickness with spin-coating method is that the recording layer 1 of 0.1 μ m and middle layer 2 that thickness is 3 μ m form recording portion 3 (recording layer 1a～1f, middle layer 2a～2e), and then to have formed by thickness be the protective seam 4 that the polycarbonate (absorbing wavelength is below 0.36 μ m) of 75 μ m is formed.
Recording layer 1a～1f is respectively with comprising 2 , and the coating of 5 -didecyl distich seven benzene (is that the two-photon absorption sensitivity of the light of 0.39 μ m, 0.66 μ m is 500 times of above-mentioned diarylethene to wavelength of fluorescence) 50 percents by volume and diarylethene (absorbing wavelength is 0.31 μ m～0.42 μ m) 50 percents by volume forms.Middle layer 2a～2e forms with the coating that comprises ultraviolet curable resin (absorbing wavelength is below 0.36 μ m).
Fig. 7 shows being recorded as prerequisite by two-photon absorption, to the carrier irradiation of embodiment 1 change pulse width, wavelength is the pulse laser of 660nm, the energy threshold when measuring record 1 bit and the result of peak power threshold value.Along with the pulse width of pulse laser is elongated, the threshold value of the peak power of record 1 bit presents the tendency of reduction on carrier.By pulse width being made as more than 5 psecs, the peak power threshold value can be suppressed to below the 50W.When pulse width was made as for 3 nanoseconds, can form information bit by enough peak power threshold value 2.2W.
On the other hand, write down the required energy threshold of 1 bit, minimum concerning the laser of 100 femtoseconds is 36 little J, if pulse width is elongated, then presents the tendency that increases slowly.By pulse width being made as below 3 nanoseconds, energy threshold can being suppressed to 6 and receiving below the J.
Go out by above results verification,, pulse width be made as under the situation of 3 nanoseconds according to the carrier of embodiment 1, can enough peak powers be 2.2W laser, form 1 information bit with 1 pulse.
(comparative example)
Except only having formed recording layer 1a～1f, made carrier similarly to Example 1 with diarylethene (absorbing wavelength is 0.31 μ m～0.42 μ m).
Fig. 8 shows being recorded as prerequisite by two-photon absorption, to the carrier irradiation of comparative example change pulse width, wavelength is the pulse laser of 660nm, the energy threshold when measuring record 1 bit and the result of peak power threshold value.As shown in Figure 8, confirm in the carrier of comparative example, pulse width be made as under the situation of 3 nanoseconds, can enough peak powers be 200W laser, form 1 information bit with 1 pulse.
The carrier of comparing embodiment and the carrier of comparative example are as can be known, the carrier of embodiment can enough peak powers below 3W laser, form 1 information bit with 1 pulse, and the carrier of comparative example can not be with the laser of peak power below 3W, form 1 information bit with 1 pulse.In addition, can confirm that under the situation that pulse width is made as 100 femtoseconds～10 nanoseconds, the recording sensitivity of the carrier of embodiment has been brought up to about 100 times of carrier of comparative example.
Utilizability on the industry
According to carrier of the present invention and manufacture method thereof and recording and playback method, Apparatus for optically recording and reproducing information, recording sensitivity improves, even have non-unlike in the past The laser of normal high peak power also can enough 1 pulses form 1 information bit. Therefore, Carrier and the optical information that can carry out high sensitivity and high-speed record can be provided Record reproducing device.

Claims (46)

1. a carrier comprises recording portion, by to above-mentioned recording portion irradiation recording light or playback light writes down or information reproduction, it is characterized in that,
If above-mentioned record light wavelength is λ 1, then
Above-mentioned recording portion comprises:
The 1st fluorophor, absorbing wavelength are λ 1The 1st light time of/n produces the 2nd light; With
The photosensitive material of photon mode, absorb above-mentioned the 2nd light after, its optical constant changes;
Above-mentioned the 1st fluorophor is to the n photonic absorption sensitivity of above-mentioned recording light, and is bigger to the n photonic absorption sensitivity of above-mentioned recording light than above-mentioned photosensitive material;
Wherein, n is the integer more than 2.
2. carrier as claimed in claim 1, above-mentioned recording portion comprises the recording layer more than 1 layer, and above-mentioned recording layer comprises above-mentioned photosensitive material and above-mentioned the 1st fluorophor that is blended in the above-mentioned photosensitive material.
3. carrier as claimed in claim 2, above-mentioned recording portion comprise a plurality of above-mentioned recording layers, and above-mentioned a plurality of recording layers are that folder is being established above-mentioned recording light and the transparent in fact middle layer of above-mentioned playback light and stacked.
4. carrier as claimed in claim 1, above-mentioned recording portion comprises: auxiliary recording layer comprises above-mentioned the 1st fluorophor; And recording layer, adjacently with above-mentioned auxiliary recording layer fetch configuration, and comprise above-mentioned photosensitive material.
5. carrier as claimed in claim 4 is provided with a plurality of duplexers of being made up of above-mentioned recording layer and above-mentioned auxiliary recording layer, between adjacent above-mentioned duplexer, is provided with above-mentioned recording light and the transparent in fact middle layer of above-mentioned playback light.
6. carrier as claimed in claim 2, whole above-mentioned recording portion is above-mentioned recording layer.
7. carrier as claimed in claim 6, the thickness of above-mentioned recording layer are more than 2 times of wavelength of the long side in above-mentioned record light wavelength and the above-mentioned reproduction light wavelength.
8. carrier as claimed in claim 1,
Be made as and wiped the information that writes down on the above-mentioned carrier and the light wavelength of wiping of shining is λ 2, then
It is λ that above-mentioned recording portion also comprises absorbing wavelength 2The 3rd light time of/n produces the 2nd fluorophor of the 4th light;
Above-mentioned the 4th light wavelength compares λ 1/ n is long, is comprised in the absorbing wavelength district of the above-mentioned photosensitive material that has write down above-mentioned information;
Above-mentioned the 2nd fluorophor is to above-mentioned n photonic absorption sensitivity of wiping light, and is bigger to above-mentioned n photonic absorption sensitivity of wiping light than the above-mentioned photosensitive material that has write down above-mentioned information.
9. carrier as claimed in claim 1, above-mentioned the 2nd light wavelength is shorter than above-mentioned recording light and above-mentioned reproduction light wavelength.
10. carrier as claimed in claim 9, above-mentioned the 2nd light wavelength is more than the 0.3 μ m, below the 0.5 μ m.
11. carrier as claimed in claim 1, above-mentioned photosensitive material comes down to transparent to above-mentioned recording light and above-mentioned playback light.
12. carrier as claimed in claim 1, above-mentioned photosensitive material comprises the material that can absorb above-mentioned the 1st light.
13. carrier as claimed in claim 1, above-mentioned photosensitive material is a photochromic material.
14. carrier as claimed in claim 13, above-mentioned photochromic material comprises diarylethene.
15. carrier as claimed in claim 2, above-mentioned photosensitive material comprises diarylethene, and above-mentioned recording layer also comprises above-mentioned recording light and above-mentioned playback light are come down to transparent resin.
16. carrier as claimed in claim 1, above-mentioned photosensitive material are side chain type liquid crystal macromolecule or photopolymer.
17. carrier as claimed in claim 1, above-mentioned optical constant is a refractive index.
18. carrier as claimed in claim 1, above-mentioned the 1st fluorophor is a crystal grain.
19. carrier as claimed in claim 18, the mean grain size of above-mentioned crystal grain is littler than above-mentioned recording light and above-mentioned reproduction light wavelength.
20. carrier as claimed in claim 18, above-mentioned crystal grain is made up of inorganic material.
21. carrier as claimed in claim 20, above-mentioned inorganic material comprise from by europium activation strontium pyrophosphate magnesium, and the group formed of barium silicate at least a kind of material selecting.
22. carrier as claimed in claim 18, above-mentioned crystal grain is made up of semiconductor material.
23. carrier as claimed in claim 22, the crystal grain of being made up of above-mentioned semiconductor material is passivated.
Hydrogen is passivated 24. carrier as claimed in claim 22, the crystal grain of being made up of above-mentioned semiconductor material have mixed.
25. carrier as claimed in claim 22, the energy gap of above-mentioned semiconductor material is more than the 2.5eV, below the 8.3eV.
26. carrier as claimed in claim 22, above-mentioned semiconductor material comprise at least a kind of material selecting from the group of being made of zinc paste, gallium nitride, zinc selenide, aluminum phosphate, zinc sulphide, cadmium sulfide, silicon, germanium, tin oxide, titanium dioxide, tungsten oxide, strontium titanates, silit and indium oxide.
27. carrier as claimed in claim 1, above-mentioned the 1st fluorophor is the organic fluorescence pigment.
28. carrier as claimed in claim 2, above-mentioned the 1st fluorophor is the organic fluorescence pigment, and above-mentioned recording layer also comprises above-mentioned recording light and the transparent in fact resin of above-mentioned playback light.
29. carrier as claimed in claim 28 comprises dendritic to above-mentioned recording light and the transparent in fact resin of above-mentioned playback light.
30. carrier as claimed in claim 27, organic fluorescence pigment comprise distich seven benzene series pigments.
31. carrier as claimed in claim 1, above-mentioned photosensitive material and above-mentioned the 1st fluorophor all are organic materials, and bonding another material on the side chain of any material in above-mentioned photosensitive material and above-mentioned the 1st fluorophor.
32. carrier as claimed in claim 31, above-mentioned photosensitive material comprises diarylethene, and above-mentioned the 1st fluorophor comprises distich seven benzene series pigments.
33. carrier as claimed in claim 8, above-mentioned photosensitive material, above-mentioned the 1st fluorophor and the 2nd fluorophor are organic materials, and bonding at least a kind of material in all the other 2 kinds of materials on the side chain of a kind of material selecting from the group of being made up of above-mentioned photosensitive material, above-mentioned the 1st fluorophor and the 2nd fluorophor.
34. carrier as claimed in claim 33, above-mentioned photosensitive material comprises diarylethene, and above-mentioned the 1st fluorophor comprises distich seven benzene series pigments, and it is pigment that above-mentioned the 2nd fluorophor comprises the diphenylamine stilbene.
35. a recording and playback method to described carrier record of claim 1 or information reproduction, is characterized in that,
Comprise following step: above-mentioned recording light is shone on the above-mentioned recording portion, change the optical constant of above-mentioned photosensitive material with above-mentioned the 2nd light of above-mentioned the 1st fluorophor generation;
In above-mentioned steps, above-mentioned the 2nd light wavelength is shorter than above-mentioned recording light and above-mentioned reproduction light wavelength.
36. the manufacture method of a carrier, this carrier comprises the recording portion with the recording layer more than 1 layer, by to above-mentioned recording portion irradiation recording light or playback light writes down or information reproduction, it is characterized in that,
Comprise following operation: the coating that comprises the 1st fluorophor and photosensitive material by coating forms above-mentioned recording layer;
If above-mentioned record light wavelength is λ 1, then above-mentioned the 1st fluorophor absorbing wavelength is λ 1The 1st light time of/n produces the 2nd light;
Above-mentioned photosensitive material changes optical constant by absorbing above-mentioned the 2nd light;
Above-mentioned the 1st fluorophor is to the n photonic absorption sensitivity of above-mentioned recording light, and is bigger to the n photonic absorption sensitivity of above-mentioned recording light than above-mentioned photosensitive material.
37. the manufacture method of carrier as claimed in claim 36,
Also comprise following operation: by coating by to above-mentioned recording light and above-mentioned playback light in fact the coating formed of material transparent form the middle layer;
Alternately repeat stipulated number with forming the operation of above-mentioned recording layer and the operation in the above-mentioned middle layer of formation.
38. the manufacture method of carrier as claimed in claim 36,
In the operation that forms above-mentioned recording layer,
The above-mentioned coating that also comprises the 2nd fluorophor by coating forms above-mentioned recording layer;
Wherein, be made as and wiped the information that writes down on the above-mentioned carrier and the light wavelength of wiping of shining is λ 2, then above-mentioned the 2nd fluorophor absorbing wavelength is λ 2The 3rd light time of/n produces the 4th light;
Above-mentioned the 4th light wavelength compares λ 1/ n is long, is comprised in the absorbing wavelength district of the above-mentioned photosensitive material that has write down above-mentioned information;
Above-mentioned the 2nd fluorophor is to above-mentioned n photonic absorption sensitivity of wiping light, and is bigger to above-mentioned n photonic absorption sensitivity of wiping light than the above-mentioned photosensitive material that has write down above-mentioned information.
39. an apparatus for optically recording and reproducing information carries out recording of information or reproduction to the described carrier of claim 1, it is characterized in that,
Comprise: the light source of outgoing recording light;
The light source of outgoing playback light;
Above-mentioned recording light and above-mentioned playback light are converged to object lens on the above-mentioned carrier; And
Detection is by the photodetector of the light of above-mentioned carrier reflection;
Utilize the variation of optical constant of the above-mentioned recording portion of above-mentioned carrier, on above-mentioned recording portion, form information bit.
40. apparatus for optically recording and reproducing information as claimed in claim 39 comprises that also outgoing wipes the light source of light.
41. it is flashlamp that apparatus for optically recording and reproducing information as claimed in claim 39, above-mentioned outgoing are wiped the light source of light.
42. apparatus for optically recording and reproducing information as claimed in claim 39, the light source of above-mentioned outgoing recording light is a pulsed laser light source, and pulse width is 100 femtoseconds～10 nanoseconds.
43. apparatus for optically recording and reproducing information as claimed in claim 39, the wavelength of the light source of the above-mentioned outgoing recording light of the wavelength ratio of the light source of above-mentioned outgoing playback light is short.
44. apparatus for optically recording and reproducing information as claimed in claim 39 is by the order of the information bit of obstructed overwriting on recording portion, at the three-dimensional ground of above-mentioned recording portion of above-mentioned carrier recorded information bit.
45. apparatus for optically recording and reproducing information as claimed in claim 44, in the above-mentioned recording portion of above-mentioned carrier, from from the farther position of object lens near the position of object lens recorded information bit successively.
46. apparatus for optically recording and reproducing information as claimed in claim 39, the light source of the light source of the above-mentioned recording light of outgoing and the above-mentioned playback light of outgoing is shared.
CN2004800146953A 2003-05-28 2004-05-27 Information recording medium and its manufacturing method, recording/reproducing method, and optical information recording/reproducing device Expired - Fee Related CN1795417B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104134448A (en) * 2014-06-30 2014-11-05 南京邮电大学 Multi-wavelength laminated fluorescence data memory, device manufacturing method of multi-wavelength laminated fluorescence data memory and reading method of multi-wavelength laminated fluorescence data memory

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2004077424A1 (en) * 2003-02-25 2006-06-08 松下電器産業株式会社 Optical information record carrier
US20080254405A1 (en) * 2005-01-26 2008-10-16 Montgomery R Eric Method and device for improving oral health
US20080032253A1 (en) * 2005-02-02 2008-02-07 Montgomery R E Device and method for improving oral health
CN101133456A (en) 2005-03-02 2008-02-27 松下电器产业株式会社 Disc cartridge and photon mode optical information recording/reproducing apparatus
CN101171633B (en) 2005-04-27 2010-12-15 松下电器产业株式会社 Information recording medium and optical information recording/reproducing device
US8054727B2 (en) 2005-11-08 2011-11-08 Panasonic Corporation Information recording medium and method for manufacturing the same, and optical information recording/reproducing device
CN101346764A (en) * 2005-11-28 2009-01-14 梅姆派尔有限公司 Multi-layer three dimensional non-linear optical data carrier and method of recording/reading data therein
US20090173724A1 (en) * 2006-03-30 2009-07-09 Yoshiaki Ogino Product laser irradiation device, laser irradiation method and method for manufacturing modified object
US20100290332A1 (en) * 2007-05-09 2010-11-18 Mempile Inc. Optical data carrier with reference layer
WO2009096432A1 (en) * 2008-01-30 2009-08-06 Osaka University Optical recording material, optical recording method, photosensitive material, photolithography method, photopolymerization initiator and photosensitizing agent
JP4596284B2 (en) * 2008-05-26 2010-12-08 ソニー株式会社 Optical disc apparatus and focus control method
JP4798188B2 (en) 2008-08-22 2011-10-19 ソニー株式会社 Optical information recording apparatus and optical information recording method
JP2010097632A (en) * 2008-10-14 2010-04-30 Fujifilm Corp Method and apparatus for reproducing information from optical recording medium
RU2503069C2 (en) * 2008-11-12 2013-12-27 Панасоник Корпорэйшн Optical recording medium and optical information device
JP2011014187A (en) * 2009-06-30 2011-01-20 Fujifilm Corp Simultaneous two-photon absorption recording-reproduction method, and simultaneous two-photon absorption recording material for use therein
JP5357114B2 (en) 2010-07-13 2013-12-04 富士フイルム株式会社 Optical information recording medium

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6483735B1 (en) * 1989-04-25 2002-11-19 The Regents Of The University Of California Two-photon, three-or four-dimensional, color radiation memory
US5399451A (en) * 1991-03-14 1995-03-21 Matsushita Electric Industrial Co., Ltd. Optical recording medium and method for using the same
JP2552036B2 (en) * 1991-03-14 1996-11-06 松下電器産業株式会社 WDM optical recording medium and recording, erasing and reproducing method using the same
JPH06118306A (en) * 1992-10-02 1994-04-28 Senri Oyo Keisoku Kenkyusho:Kk Reading method of optical storage device
JPH06240242A (en) * 1993-02-15 1994-08-30 Nippon Telegr & Teleph Corp <Ntt> Polymeric photochromic composition
JP3434321B2 (en) * 1993-03-29 2003-08-04 三洋電機株式会社 Optical recording method
JPH0777774A (en) * 1993-06-18 1995-03-20 Ricoh Co Ltd Optical information recording medium
DE4434966A1 (en) * 1994-09-30 1996-04-04 Bayer Ag New side group polymers and their use for optical components
WO1999023650A1 (en) * 1997-10-31 1999-05-14 Omd Devices Llc Multi-layered photochromic optical data disk
WO2000005624A1 (en) * 1998-07-21 2000-02-03 Trid Store Ip, L.L.C. Increasing writing efficiency in 3d optical data storage system
JP2001184744A (en) * 1999-12-27 2001-07-06 Toshiba Corp Recording medium and method for manufacturing the same
JP2001325745A (en) * 2000-05-16 2001-11-22 Sony Corp Optical recording medium and reproducing device and recording reproducing device for the same
AU2001270320A1 (en) * 2000-06-15 2001-12-24 3M Innovative Properties Company Multicolor imaging using multiphoton photochemical processes
JP4190212B2 (en) * 2001-06-15 2008-12-03 三菱化学株式会社 Photochromic material and color dosimeter using the same
US7101497B2 (en) * 2001-06-15 2006-09-05 Masahiro Irie Photochromic material and color dose meter using the same
JP4324333B2 (en) * 2001-07-17 2009-09-02 富士フイルム株式会社 Optical information recording medium
US6750266B2 (en) * 2001-12-28 2004-06-15 3M Innovative Properties Company Multiphoton photosensitization system
JP4132930B2 (en) * 2002-04-10 2008-08-13 独立行政法人科学技術振興機構 Optical recording medium and optical recording / reproducing method
JP4511126B2 (en) * 2003-05-27 2010-07-28 富士フイルム株式会社 Two-photon absorption coloring material and two-photon absorption coloring method
US7771915B2 (en) * 2003-06-27 2010-08-10 Fujifilm Corporation Two-photon absorbing optical recording material and two-photon absorbing optical recording and reproducing method
JP2005078722A (en) * 2003-09-01 2005-03-24 Hitachi Ltd Device and method for recording information, and information recording medium
US7335899B2 (en) * 2004-12-03 2008-02-26 Eastman Kodak Company Media for detection of X-ray exposure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104134448A (en) * 2014-06-30 2014-11-05 南京邮电大学 Multi-wavelength laminated fluorescence data memory, device manufacturing method of multi-wavelength laminated fluorescence data memory and reading method of multi-wavelength laminated fluorescence data memory

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